Shank piece for shoes



July 5, 1932. P, HE|N SHANK PIEGIJ] FOR SHOES Filed Dec. l, 1930 Hg. a

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Patented July 5, 1932 APATENT. *OFFICE PAUL HEIN, OF BERLIN-BAUMSCHULENWEG, GERMANY SHAN'IK.r PIECE FOR SHOES Application led December 1, 1930, Serial No. 49.5),349, and in Germany July 2, 1930.

This invention relates to a shoe-joint .support, the essence of which resides primarily in the fact that it consist oftwo portions connected with one anothe toform a single piece, namely a lower portion of hard cardboard, such as the so-called iron board, or

cardboard strengthened with steel, and an ,l upper portion of softer cardboard in such a wayv that the lateral margin of the softer l cardboard stands out beyond the actual joint curve between the heel and the ball of the foot. The upper cardboard portion then corresponds to the welt from the heel to the ball, while the lower portion is of the shape of the welt in the heel only, and from the heel to the ball is made continuously narrower, being suitably bevelled at the sides and at the tip.

Such a joint support is cheap to manufacy and also to all other processes of this kind inV an equally satisfactory manner, and a stitching, sewing or the like of the upper leather to the welt, with insertion, is rendered possible, .since the soft cardboard projectingl with its free edge is adapted to be penetrated by rivets and tacks.

Further features and methods of employment of the invention will be gathered from the following description:

The invention is illustrated .by way of example in various constructional forms in the 4E accompanying drawing, in which Figure 1 shows the joint-support according to the invention, in lan,

Figure 2 shows the jolnt support from below,

Figure 3 shows a further constructional fprii 'with reinforcing insertion made of s ee Figure 4 isa longitudinal section on the line 4-4 in Figure 3, Figure v5 is a modification of a cross section on the line 5-5 in Figure 3 on a larger scale, Figure 6 is a modification of a similar cross section, also on a larger scale, showing the connection of the supporting cardboard member alone with steel insertion,

Figure 7 shows in plan and partial longitudinal section the joint support according to Figure 2, with the welt inserted, and

Figure 8 is a back view of the joint support shown in Figure 7. 35

In this drawing, b is the part consisting of a softer cardboard. a forms the lower part of a so-called iron board or other material, which may be individually strengthened if desired by a steel insertion e, The shape of the 'upper portion corresponds to the Welt from the heel right to the ball of the foot, whilethe underlay a is only of the shape of the welt in the heel, and from the heel to the ball is kept about 5 millimeters nar- 75 rower throughout. The underlay a is suitably bevelled at the sides as well as at the tip.

The two cardboard members a and b may be held together and held on to the welt in any convenient manner, for instance by means of adhesive, rivets, or similar connecting means.

In pre-forming the combined joint a groove is 'pressed into the part a for the purpose of securing the `joint to the ledges.

The u per portion b of the joint serves for rein orcing the welt and for rivetting the upper to the welt. Furthermore only the upper and softer part b of the joint comes into question for the seam sewn through. The part a of hard. cardboard or similar .material serves the wearer of the shoe asa support in the joint; in special cases this portion may be strengthened if desired by means of steel, as already mentioned, for example by -providing one of the cardboard portions with a preferably dove-tail shaped undercut groove, which not only holds the steel insertion fast by means of its dove-tail but also embeds it in the joint portion in such a way that the steel 'insertion is precluded from rising above the joint portion at any part of the curve of the joint. In this manner the steel insertion is made imperceptible to the wearer of the shoe.

In the constructional form illustrated in Figure 3, each of the two halves a and b of the joint is suitably provided with a groove d of only half the depth of the steel insertion e. The steel insertion e is then first inserted in one of the grooves d, the other cardboard member with the equal groove is laid upon the steel insertion e lying in the groove in the first cardboard member and is stitched to the other portion of the joint in the usual manner, for instance by means of tacks. The steel insertion e is then firmly embedded between the members a and b and cannot shift either towards the side or forwards or backwards.

The embedding of the steel insertion e between the members a and may of course be effected in such a way that only the under portion a has the full groove depth of the steel insertion e, so that the steel insertion e can never wear out, but, with the cardboard member to be laid upon the joint portion a,

presents a smooth surface, neither projecting nor sunken.

In a similar manner, as illustrated in Figure 5, only the upper cardboard member may comprise a groove d or other holding device,

which holds the steel insertion e.' In this case also cheaper and softer cardboard may then be taken for the iron board member a in order to equalize the cost of manufacture, since the actual supporting work is then taken over by the steel joint itself.

The resilient steel insertion is preferably so dimensioned that it is possible to nail in the rear lportion of theheel of the joint support.

Finally, according to Figure 6, it is also possible for the member a, constituting the actual joint support and provided with a full heel, to carry on the upper or underside the steel insertion e.

Instead of the iron board, other material of a similar-character may of course be selected.

A further feature of the invention-resides in the fact that the stitching of the two cardboard members a and b connected into a single piece is effected in such a way that at the open end, at which the lower and harder cardboard' portion a projects beyond the upper and softer portion b, there is a gap into which the suitably bevelled half sole c is inserted, and, after insertion, may be secured by stitching, riveting or the like to the joint piece, preferably to the overlapping portion b of the upper cardboard member, and connected with the joint support to form a unitary whole, as illustrated in Figures 7 and 8.

Hitherto the Welt has been made in one piece from the toe right to the heel, and has had to consist of the best material, particularly for the Littlewa-y process. The best material is however only used in front at the ball of the foot, where the foot rolls.

As a further feature of the invention, a division of the welt is rendered possible in such a Way that only the -portion that is subjected to bending when the foot rolls is madeof best material, while the other portion of the heel is either omitted entirely or replaced by the shoe joint support according to the invention, or else'may consist of any desired inelastic material whatever. In the case of it being replaced by the shoe joint support, the upper soft cardboard in the latter may be selected in a thickness corresponding to the welt.

What I claim is l. For use in a shoe having an upper leather and a welt, a lshoe joint support comprising a member made of hard cardboard extending from the heel to about the ball of the wearers foot, and a member made of softer cardboard united integrally to the hard cardboard member, the side margins of the softer cardboard member projecting beyond those of the hard cardboard member to afford passage to attaching means for the purpose of fastening the upper leather to the welt.

2. For use in a shoe having an upper leather and a welt, a shoe joint support comprising a member made of hard cardboard such asthe so-called iron board extending from the heel to about the ball of the Wearers foot, and a member made of softer cardboard united integrally to the top surface of the hard cardboard member, the side margins of the softer cardboard member projecting beyond those of the hard cardboard member to afford passage to attaching means for the purpose of fastening the upper leather to the welt.

3. For use in a shoe having an upper leather and a welt, a shoe joint support comprising a member made of hard cardboard such as the so-called iron board extending from the heel to about the ball of the wearers foot, and a member made of softer cardboard united integrally to the top surface of the hard cardboard member, the softer cardboard member corresponding in shape to the welt ofthe shoe from the heel to about the ball of the Wearersv foot, and the harderpcardboard member being of the shape of the welt only in the heel portion, and being narrower than the softer cardboardporti on from the heel to about the ball of the foot, and being beveled at the sides and at the front end.v

4. For use in a shoe having an upper leather and a welt, a shoe joint support comprising a member made of hard cardboard extending from the heel to about the ball of the wearers foot, a member made of softer, cardboard united integral-ly tothe hard cardboard member,the side margins of the softer cardboard member projecting beyond those of the hard cardboard member to al'ord passa e to attaching means forthe pur ose of asteningy the upper leather to the fe t, and a steel reinforcing insertion embedded to some extent in the hard cardboard member. 5. vF or use in a shoe having an upper leather and a welt, a shoe joint support comprising a member made of hard cardboard extending from the heel to about the ball of' the wearers foot, a member made of softer cardboard united integrally to the hard cardboard member, the side margins of the softer cardboard member projecting beyond those of the hard cardboard member to afford passage to attaching means for the purpose of fastening the upper leather to the Welt, and a steel reinforcing insertion embedded to someex-l tent in the softer cardboard member.

6. For use in a shoe having an upper leather and a welt, a shoe joint support com- 9. In a shoe having an'upper leather and a welt, a shoe joint comprlsing' a member made of hard cardboard extending from the heel to aboutthe ball of the wearers foot, a'

member made of softer cardboard united integrally to the hard cardboard member, a

name to this specication. Y

v PAUL HEIN.

prising a member made of hard cardboard extending from the heel to about the ball of the wearersfoot, a member made of softer cardboard united inte -rally to the hard cardboard member, the si e margins of the softer cardboard member projecting beyond those g of the hard cardboard member to afford passage to attaching means for the purpose of 3 fastening the upper leather to the welt, and

'a steel reinforcing insertion interposed between the two cardboard members and em bedded partly in one and partly yin the other.

. 7. For use in a shoe having an upper leather and a welt, a shoe oint sup ort comprising a member made of ard car board extendin from the heel to about the ball -of the wearer s foot, a member made of softer cardboard united integrally to the hard cardboard member, the side margins of the softer card- `board member projectlng beyond those of the hard cardboard member to'aiord passage to attaching means fr the purpose o fastening the upperleather to the welt, and a reinforc- "5 ing insertion of strong metal such vas steel dovetailed into one of the cardboard mem-- bers.

8. Ina shoe having an `upper leather and a welt, a shoe joint support comprising a 5o member made of hard ,cardboard extendin Y from the heel to about the ball of the wearer s foot, a member made of softer cardboard united integrally to' the top surface of the hardv cardboard member, the side margins of the softer cardboard member projecting beyond those of the hard cardboard member to afford passage to attaching means for the purpose of fasteningthe upper leather to the welt, and the lower and harder cardboard memberprojecting beyond the upper and softer vone at the front end and leavin a ga between them at that end, and a beved `ha f sole inserted inthe said ap between the two-cardboard members an integrally se- 5 cured to them. 

